A former UBS PaineWebber employee was sentenced to eight years in prison on Wednesday for <A HREF="http://www.eweek.com/article2/0,1895,2072394,00.asp?kc=EWNAVEMNL121406EOAD">planting a computer logic bomb</A> on company networks and betting its stock would go down. The investment scheme backfired when UBS stock remained stable after the computer attack and Roger Duronio lost more than $23,000. A federal judge in New Jersey sentenced Duronio, 64, to 97 months in prison and ordered him to make $3.1 million in restitution to his former employer, the U.S. attorney's office said in a statement. Duronio was convicted on July 19 of one count of securities fraud and one count of computer fraud in the 2002 case.